公开(公告)号：US10723880B2

公开(公告)日：2020-07-28

申请号：US16494281

申请日：2018-02-28

Applicant: The Yokohama Rubber Co., LTD.

Inventor： Mitsuhiro Iwata ,  Yukihiro Kamimura ,  Tomohiro Ito

IPC: C08L79/00 ,  C08L51/04 ,  C08K3/36 ,  C08K5/00 ,  C08K5/315 ,  C08J5/24 ,  C08G73/00 ,  C08K3/013

Abstract: A cyanate ester resin composition contains: a cyanate ester resin; a curing agent or a curing accelerator; silica microparticles; and core-shell rubber particles; in which the resin composition includes from 1 to 5 parts by mass of the silica microparticles and from 2 to 10 parts by mass of the core-shell rubber particles based on 100 parts by mass of the cyanate ester resin, and a mass ratio of the silica microparticles to the core-shell rubber particles is from 1/1 to 1/5.

公开(公告)号：US12076968B2

公开(公告)日：2024-09-03

申请号：US18546030

申请日：2021-10-11

Applicant: The Yokohama Rubber Co., LTD.

Inventor： Yukihiro Kamimura ,  Tomohiro Ito

IPC: B32B37/14 ,  B32B5/18 ,  B32B7/10 ,  B32B7/12 ,  B32B27/08 ,  B32B27/28 ,  B32B27/38 ,  B32B37/06

CPC classification number: B32B37/144 ,  B32B5/18 ,  B32B7/10 ,  B32B7/12 ,  B32B27/08 ,  B32B27/286 ,  B32B27/38 ,  B32B37/06 ,  B32B2250/02 ,  B32B2250/24 ,  B32B2266/0214 ,  B32B2307/30 ,  B32B2307/72 ,  B32B2307/736

Abstract: A method of molding a sandwich panel includes a step of providing, on one or both surfaces of an (a) core material, a prepreg or the prepreg and an adhesive as a (b) skin material. The (a) core material is a super engineering plastic foam having a glass transition temperature of greater than 200° C. The (b) skin material contains: a (b-1) epoxy resin having an average molecular weight of 1300 or more or having a trishydroxymethane-type or cresol novolac-type structure and containing, in a total epoxy resin, an amount of 70 to 100 mass % of an epoxy resin that is semi-solid or solid; a (b-2) epoxy resin containing, in the total epoxy resin, an amount of 0 to 30 mass % of an epoxy resin that is liquid; and a (b-3) curing agent.

公开(公告)号：US20200071524A1

公开(公告)日：2020-03-05

申请号：US16494281

申请日：2018-02-28

Applicant: The Yokohama Rubber Co., LTD.

Inventor： Mitsuhiro Iwata ,  Yukihiro Kamimura ,  Tomohiro Ito

IPC: C08L79/00 ,  C08K3/013 ,  C08K3/36 ,  C08L51/04 ,  C08K5/00 ,  C08K5/315 ,  C08J5/24

Abstract: A cyanate ester resin composition contains: a cyanate ester resin; a curing agent or a curing accelerator; silica microparticles; and core-shell rubber particles; in which the resin composition includes from 1 to 5 parts by mass of the silica microparticles and from 2 to 10 parts by mass of the core-shell rubber particles based on 100 parts by mass of the cyanate ester resin, and a mass ratio of the silica microparticles to the core-shell rubber particles is from 1/1 to 1/5.

公开(公告)号：US12218417B2

公开(公告)日：2025-02-04

申请号：US18260726

申请日：2021-09-02

Applicant: The Yokohama Rubber Co., LTD.

Inventor： Teruki Miyazaki ,  Yukihiro Kamimura ,  Tomohiro Ito

IPC: H01Q15/14 ,  H01Q1/42

Abstract: To improve quality of a radome using a cyanate ester resin for a skin layer. A radome is formed of a multilayer structure in which a plurality of skin layers are layered on a surface of a core member. The plurality of skin layers include a first fiber reinforced plastic layer containing the cyanate ester resin and a fiber material and a second fiber reinforced plastic layer containing an epoxy resin and a fiber material. The second fiber reinforced plastic layer is disposed at a position in contact with the surface of the core member. A proportion of a thickness of the second fiber reinforced plastic layer to a thickness of all of the skin layers is preferably 50% or less.